The role of Notch signaling in diabetic endothelial progenitor cells dysfunction

Dewi Sukmawati, Rica Tanaka, Rie Ito-Hirano, Satoshi Fujimura, Ayato Hayashi, Seigo Itoh, Hiroshi Mizuno, Hiroyuki Daida

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Aims To investigate the role of Notch signaling pathway in vasculogenic dysfunction of diabetic EPCs (DM-EPCs). Methods The study was performed in mice and diabetes was induced with Streptozotocin. The functional consequences of Notch pathway modulation were studied by assessment of colony forming capacity (EPC colony forming assay), EPC differentiation capacity (% of definitive EPC-CFU (dEPC-CFU)), circulating EPCs (EPC culture assay) and migrated cells (migration assay); in the presence of Notch inhibitor (γ-secretase inhibitors (GSI)) compared to control. Notch pathway and VEGF involvement in DM- EPCs were assessed by gene expression (RT-qPCR). Results DM demonstrated to increase Notch pathway expression in bone marrow (BM) EPCs followed by lower EPC-CFU number, EPCs differentiation capacity, number of circulating EPCs, migrated cells and VEGF expression compared to control (p < 0.05). Inhibition of Notch pathway by GSI rescued vasculogenic dysfunction in DM-EPCs as represented by increase in EPC-CFU number, differentiation capacity and number of circulating EPCs (p < 0.05). Conclusion Our findings indicate the involvement of Notch pathway in mediating DM-EPCs dysfunction including less number of EPC-CFU, circulating EPCs and migrated cell number compared to control. Further in vitro inhibition of Notch pathway by GSI rescued DM-EPC dysfunction. Therefore targeting Notch pathway in DM may provide a target to restore DM-EPC dysfunction.

Original languageEnglish
Pages (from-to)12-20
Number of pages9
JournalJournal of Diabetes and its Complications
Volume30
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Diabetes
  • Endothelial progenitor cells
  • Notch signaling pathway
  • Vasculogenesis
  • γ-Secretase inhibitor

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